最近做瞭一個類似google remote的應用，主要功能是手機端通過網絡發出按鍵，接收端接收並處理其事件；
這裡理所當然就想到socket通信。而要建立連接實現要知道接收端的IP地址，參考網咯最終實現；以下是發送端和接收端的實現代碼。
接收端：
protected static final int SendPort = 8600;
protected static final int ReceivePort = 8601;
private MulticastSocket socket;
private InetAddress address;
private DatagramPacket packet;
socket = new MulticastSocket(ReceivePort);
address = InetAddress.getByName("224.0.0.1");
socket.joinGroup(address);
private Runnable mSendRunnable = new Runnable() {
public void run() {
//發送數據包,尋找接收端
byte[] buf = "SMART IR".getBytes();
packet = new DatagramPacket(buf, buf.length, address, SendPort);
try {
socket.send(packet);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
接收端:
public class IRReceiveSetupConnectSocket {
protected static final String TAG = "MultiSocketA";
protected static final int SendPort = 8601;
protected static final int ReceivePort = 8600;
private MulticastSocket socket;
private InetAddress address;
private boolean mReceiveMultiSocket = true;
private int ipaddr;
public IRReceiveSetupConnectSocket(int ip) throws IOException{
ipaddr = ip;
socket = new MulticastSocket(ReceivePort);
address = InetAddress.getByName("224.0.0.1");
socket.joinGroup(address);
new Thread(run).start();
}
// 此thread會一直poll multisovket的信息，隻要有接受到信息，就將自己ip地址廣播出去；發送端可以以此地址發送key（其它線程的socket）
Runnable run = new Runnable() {
@Override
public void run() {
while(mReceiveMultiSocket)
{
byte[] rev = new byte[128];
DatagramPacket packet = new DatagramPacket(rev, rev.length);
try {
Log.d("yanxi", "MultiSocket Waitting.......");
//receive connect requst,and send ipaddr to request host
socket.receive(packet);
Log.d("yanxi", "MultiSocket received........"+ new String(packet.getData()).trim());
//send ipaddr to request host
byte[] buf = (""+ipaddr).getBytes();
packet = new DatagramPacket(buf, buf.length, address, SendPort);
socket.send(packet);
Log.d("yanxi", "MultiSocket send........"+ ipaddr);
//mReceiveMultiSocket = false;
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
};
}
通過以上實現發送端就能得到接收端的IP，從而為後面的發送IR Code做基礎
